// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/output/shader.h"

#include "cc/test/test_gles2_interface.h"
#include "cc/test/test_web_graphics_context_3d.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/size.h"

namespace cc {

TEST(ShaderTest, HighpThresholds)
{
    // The test context always uses a mediump precision of 10 bits which
    // corresponds to a native highp threshold of 2^10 = 1024
    std::unique_ptr<TestWebGraphicsContext3D> test_context = TestWebGraphicsContext3D::Create();
    TestGLES2Interface test_gl;
    test_gl.set_test_context(test_context.get());

    int threshold_cache = 0;
    int threshold_min;
    gfx::Point closePoint(512, 512);
    gfx::Size smallSize(512, 512);
    gfx::Point farPoint(2560, 2560);
    gfx::Size bigSize(2560, 2560);

    threshold_min = 0;
    EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
        TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
            closePoint));
    EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
        TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
            smallSize));
    EXPECT_EQ(TEX_COORD_PRECISION_HIGH,
        TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
            farPoint));
    EXPECT_EQ(TEX_COORD_PRECISION_HIGH,
        TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
            bigSize));

    threshold_min = 3000;
    EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
        TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
            closePoint));
    EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
        TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
            smallSize));
    EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
        TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
            farPoint));
    EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
        TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
            bigSize));
}

} // namespace cc
